Loom for weaving ladder tape



-v E. a Homes 2,319,863

1.0 0! FOR wmwnm LADDER TAPE Filed-June 2, 1941 5 Sheets-Sheet 1 will NvE N TO-FL E LBRJDGE R.HOLMES @eNJr. W ATTORNEY y 1943. E. R. HOLMES 2,319,863 LOOM FOR WEAVING LADDER TAPE Filed June 2, 1941 1 5 Sheets-Sheet 2 N\/ E N TO R ELBRIDGE RIIOLMES ATTORNE May 25, 1943. 1:. R. HOLMES LOOK- FOR WEAVING LADDER TAPE Filed June "2. 1941 5 Sheets-Sheet 3 i ss \NVENTOR ELBRIDGE R. HOLMES *QLA 7 ATTORNEY I May 25', 1943. E. R. HOLMES LOOM FOR WEAVING, LADDER TAPE Filed June 2, 1941 5 Sheets-Sheet 4 I gov " s He \NVENTOR ELBR\D(5E R HOLMES ATT R N EY Ma 25, 1943. E, R, O MES 2,319,863

LOOK FOR WEAVING LADDER TAPE Filed June 2, 1941 s Sheets-Sheet INVENTOR ELBRIDGE R HOLMES A ORNEY Patented May 25 1943 UNITED STATES ?TENT OFFICE LOOM FOR WEAVING LADDER TAPE Elbridge R. Holmes, Worcester, Mass, assignor to Crompton & Knowles Loom Works, Worcestor, Mass, a corporation of Massachusetts Application June 2, 1941, Serial No. 396,274

16 Claims.

This invention relates to improvements in looms for weaving ladder tape such as that employed in the manufacture of Venetian blinds and it is the general object of the invention to provide simple operating mechanism for the weaving of a number of such tapes at one time.

Certain types of ladder tape comprise a pair of webs between which extend cords to support the slats of the Venetian blind. It is necessary to feed off the cords periodically so that they may be passed from one web to the other. It is customary to form the cords either of braided or non-kinking yarns and to pass half of them from one web to the other in one direction and the other half from the other web back to the first in the opposite direction.

The cross cords are usually carried on a beam separate from that which provides the chain or web warp threads which form the greater part of the webs and slackening means are provided to release a given length of the cords at regularly recurring intervals after which they are moved forwardly by a hook. Various mechanisms have been proposed heretofore for operating the'hooks but in most instances these mechanisms require individual operating means. It is an important object of my present invention to provide a single controlling and actuating unit for a plurality of hooks so that a number of different ladder tapes may be woven by the use of one hook controlling mechanism.

It is a further object of my present invention to provide the loom with a transverse bar carrying several hooks and control this bar by cam means which come into action periodically whenever the cords are to cross from one web to the other.

It is a further object of my present invention to mount the aforesaid bar for relative movement with respect to the breast beam laterally of the webs and then connect it to the lay so that both the backward and subsequent forward motion of the bar is effected by a force derived from the lay. In this connection I provide im proved connecting and disconnecting means controlled from a pattern surface which also controls the slackening mechanism.

It is still another object of my present invention to provide means for locking the bar and its hooks in forward position and unlocking the bar by a lateral motion which also connects it to the lay. The subsequent forward motion of the bar with the lay is effected by means of latches or dogs which return the bar back to its forward locked position and then move out of engaging 'joint control over the ladder cord hooks.

position with respect to the bar mechanism to avoid engagement therewith on subsequent forward beats of the lay.

It is another object of my present invention to provide the bar and its hooks with supporting means which permit sliding thereof with respect to the breast beam in directions laterally and longitudinally of the loom, the lateral motion being derived from a cam and the back and forth motion from the lay, the cam and lay exerting con- This control may include relatively slidable driving and driven parts of the operating mechanism.

A still further object of my invention relates to a switch cam normally disconnected from the set of hooks but operated by a control derived from the pattern surface to become operatively connected to the hooks to move them from locked to unlocked position and also establish driving connection between the hooks and the lay.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth.

In the accompanying drawings, wherein a convenient embodiment of my invention is set forth,

Fig. 1 is a front elevation of a loom made according to my present invention,

Fig. 2 is a verticalsection on line 22 of Fig. 1,

Fig. 3 is an enlarged rear elevation taken in the direction of arrow 3, Fig. 2 showing the pattern chain controlled mechanism which operates the slackener and the controller for the ladder cord hooks,

Fig. 4 is a plan view taken in the directionof arrow 4, Fig. 3.

Fig. 5 is a detailed rear elevation taken in the direction of arrow 5, Fig. 2, showing part of the slackener mechanism,

Fig. 6 is an enlarged detailed section on line 66 of Fig. 1 showing the ladder cord hook controlling switch cam.

Fig. 7 is an enlarged plan view taken in the direction of arrow 1, Fig. 2 showing the lay in forward position,

Fig. 8 is a View similar to Fig. 7 on a reduced scale showing the lay and ladder cord hooks in two positions which they assume during the backward stroke of the lay,

Fig. 9 is a detailed plan view on an enlarged scale taken in the direction of arrow 9, Fig. 2 showing the lay carried slotted actuator for the hook bar and the latch or dog on the lay which moves the hook bar forwardly,

Fig. is a detailed vertical section on line Ill-ll] of Fig. 7, parts being omitted,

Fig. 11 is a diagrammatic view similar to Fig. '7 showing the result of the lateral motion of the hook carrying bar prior to its rearward movement with th lay,

Fig. 12 is a detail side view similar to a part of Fig. 2 On an enlarged scale of the slackener cam and its control mechanism,

Fig. 13 is a perspective view showing a portion of the ladder tape which is made with my invention,

Fig. 14 is an enlarged end elevation of part of the switch cam, looking in the direction of arrow l4, Fig. 1, parts being in section, and

Fig. is a vertical section on line |5-l5, Fig. 4.

In order that the purpose of my-invention may be understood I will first describe a form of ladder tape such as can be woven on a loom equipped with my invention. In Fig. 13 I show top and bottom webs l0 and II, respectively, each formed of two different systems of warp threads, the first of which indicated at l2 comprise the chain or'web warps which always remain in their respective webs and the second of which comprise the ladder cords l3 which cross from each web to the other to form the ladder bars l4 extending between the two webs. These cords are woven into the webs along with the chain warps, but

at regular intervals are crossed from their web of origin to the other web to be woven into the latter. Thus, in the two groups of cords 13 for any given crossing one half of each group may be derived from the top web and pass downwardly to the bottom web, whil the other half of each group rises from the bottom web to be incorporated into the top web. After being woven a'given number of picks in their new positions they are again reversed and returned to the webs from which they were originally drawn. This alternation from one web to the other continues throughout the length of the tape and provides the cross threads which support the several slats of the usual Venetian blind.

The distance between webs l0 and l l in the loom is considerably less than the length of the ladder bars I and the latter are drawn forwardly from the fells of the webs to maintain the cord 'Warps l3 under tension while the picks are being laid which follow the crossings. Each web has its ladder cord and. chain warps separated to form a shed. The chain warps are derived from one or possibly two similar warp beams not shown, while the ladder cords l3, which must be longer than the tape by the lengths of the several crossing ladder bars M, are supplied by a separate beam, not shown. When the ladder cords leave one web to be incorporated into the other they cross each other at apoint behind the fells of the webs and in front of the reed when the lay is back. The ladder cord hooks then move behind this point of crossing and then advance to draw the cords l3 forwardly to permit them to be woven tightly into the webs.

The loom for weaving the above described ladder tape comprises side frames 15 connected by arches I6 which support a head motion K which,

- by means of connections not shown but well understood, control the vertical positions of the various harness frames l'l shown in Fig. 2 to form sheds in chain warps l2 for the top and bottom webs. The head motion also controls harnesses l8 which raise and lower the ladder cords 13, giving them a half throw from an outside shed to the middle shed when they are woven into their respective webs and giving them a full throw from one outside shed through the middle shed to the other outside shed when crossings are made.

The lay L is pivoted at and reciprocated backwardly and forwardly by a top or crank shaft 2| and lay connectors 22. In th present instance a link 23 pivoted at 24 to the loom frame and at 25 to the connectors and an extension 26 projecting rearwardly from the lay serves to give the lay a substantially parallel motion so that it does not have the customary angular swing. This .is desirable in view of the fact that two webs are woven one over the other. The weft system of threads is laid by the usual narrow ware top and bottom shuttles 30 and 3 I, respectively, which are actuated in any approved manner, the upper shuttles passing through the top sheds for the upper webs l0 while the lower shuttles 3| pass through the bottom sheds for the lower webs H during each backward swing of the lay.

The loom frame includes in its construction a breast beam 33 provided with a cloth guard or board 34 extending along the breast beam, see Fig. '7. It will be understood that a number of different ladder tapes are woven simultaneously and may if desired pass over part of a support 34 which also serves as a guard for certain parts to be described hereinafter. The loom also includes a bottom shaft 35 connected by gear 36 to a gear 31 of half its size fastened to the top or crank shaft. Henc the bottom shaft 35 makes one rotation for every other beat of the lay.

Th head motion K is driven by an upright shaft 40 connected by gearing 4| to the top shaft of the loom and having beveled gears 42 and 43 which drive, respectively, the upper and lower mutilated cylinders 44 and 45, respectively, giving them a complete rotation each beat of the loom. Located between thes cylinders are several harness-controlling vibrator gears two of which are shown at 46. Each gear is connected by well known mechanism to the previously described harnesses and has its vertical position determined by a pattern chain not shown.

The matter thus far described is very similar to constructions customarily employed in narrow ware looms equipped with Knowles head and having double-deck lays for the weaving of two vertically separated webs connected by ladder bars.

The slackener mechanism for the crossing or ladder cords may be substantially similar to that shown in my prior Patent No. 2,103,783 and includes a baclwvardly and forwardly movable bar suspended on hangers 5| secured to a shaft 52 rotatable on the loom frame. Several operating arms 53 secured to shaft 52 are connected by depending rods 54 to levers 55 pivoted at 56 to a rear girt 51 fastened to the loom frame. Levers 55 are connected together by a rod 58 and one of said levers is connected to a depending rod 59 extending to a cam lever 60 pivoted at 6| to the loom frame.

Lever 60 carries a roll 62 which engages a cam 63 having high and low points 64 and 65, respectively. This cam is secured to a stub shaft 66 rotatable in a bracket 61 fixed to the loom frame and having secured thereto a disk 68 the periphery of which is interrupted by an operating notch 69. A lever 10 is pivoted on the stub shaft 66 and is connected as at H to a forwardly extending rod 12 attached to the link 23. A pawl 14 is pivoted at 15 to lever 10 and has a lost-motion connection to an .arm I6,also pivoted at :15 and which receives one end-of a spring plunger TI the other end of which slides through-a stud "I8 rotatable on lever 10. A stop pin I9 on lever I limits angular motion of the pawl I4 and under normal conditions cooperates with the spring plunger to hold the pawl in the full line position shown in Fig. 12. As the lay reciprocates, therefore, lever "I0 will rock around stub shaft 66 and pawl I4 will have an idle stroke to the left, Fig. 12, and a return stroke to the right, disk 68 and therefore the cam 63 remains stationaryto hold lever 60 in low position theeffect of which is to maintain the slackener bar 50 in its rearmost position.

The pawl 14 is controlled from the head motion K'by a connector 80 pivoted to a stud 8| on an arm 82 pivoted at 83 to a horn "84 projecting upwardly from bracket 61. The stud I08 extends under the arm I6 and is normally below the latter when those parts of the webs are being woven which lie between the ladder cords.

Rod 80 is raised by mechanism to be described whenever the cross cords are to be shifted from one web to the other and while the'lay is approaching-its front position, thus rocking arm 82 to its pawl tripping position while pawl I I and lever I0 are in forward position, or to the left as viewed in Fig. 12. When lever I0 next moves rearwardly, raised pin I08 will trip pawl I4 by engagement "with arm 16, moving pawl I4 from the full to the dotted line position, Fig. 12v when the lay is rearmost, thuscausing pawl I4 to enter notch 69. As the lay next moves forward it causes pawl I4 to rock the disk 68 and cam 63 through a one-quarter rotation the effect of which is to permit raising of roll 62 and permit forward motion of the slackener rod 50.

'I'he operations just described and the structure set forth in Fig. 12 are described more fully in my prior patent No. 2,103,783 to which reference may be had for an understanding of the entire slackening mechanism. It is thought sufficient for present purposes to state that rod 50 will be permitted to move forwardly as already described herein when the lay advances on those forward beats of the loom which require the crossed ladder cords to be'advanced. The rod 50 has a subsequent return motion to its rearward position as described in the aforesaid patent, but this return motion forms no part of my present invention.

In addition to the matter already described the loom is also provided with stationary web guides 85 supported asat 86 by the breast beam 33. Each guide comprises upper and lower bars 81 and 88, respectively, between which the upper and lower webs I0 and II move toward their cloth boards 34. The loom also operates with a plurality of ladder cord advancing hooks I-I, one for each tape, and these hooks are similar in function to those heretofore used, but the manner of their control and operation is an important part of my present invention.

The matter thus far described is of usual construction and except as pointed out hereinafter forms no part of my present invention.

In carrying my invention into effect I provide a transverse bar 90 extending between the breast beam 33 and the lay L and having the hooks H secured thereto as at 9| for back and forth adjustment relatively to the bar. The latter is supported by a plurality of forwardly extending arms 92 the rear ends of which are secured as at 93 to the bar, :and the forward ends of which operating positions of the arms 92 limited in its action by stop shown in full lines in Fig. 9, but these the slot III to clear the extend between the top and bottom plates 94 and 95, respectively, of guides 96 secured "to the breast beam 33. These arms 92 are made preferably 0f fla't sheet metal and are normally at the left of the guides 96 but are capable of lateral motion to the right with respect .to the guides as viewed in Fig. 7, and are capable also of back and forth motion relatively :to the guides. In all relatively to their guides 96, the bar will be supported as to its vertical position.

The breast beam is provided with small stands 99 on which latches I00 are pivoted at I'M. A light spring I02 holds each latch yieldingly in the position shown in Fig. 7 against an adjustable stop :screw I03 carried by its supports 99. Each latch cooperates with a hook I 04 secured to the bar and movable with the latter in a lateral direction away from its latch. Cushions I05 carried .by stands 99 engage the bar 90 to prevent vibration of the latter during loom operation when it is held locked in normal forward position. Another cushion I06 mounted on the lay is engaged by a stop I01 secured to and depending from hook 'bar 90.

.In order that the bar 90 may be connected to the lay I provide several pins I09 depending from and secured to the bar, see Fig. 10, and provide the lay with an operating arm IIO for each pin. Slots III in the operating arms are proportioned to receive the pins and the latter will normally be to the left of their associated slots as shown in Fig. '7. Each operating arm I I0 is associated with a dog H4, see Fig.9, pivoted as at II5 to the corresponding arm H0 and having a rear finger II 6 located between the adjacent ends of slide rods II1 and H8. Rod II! is mounted for longitudinal motion in bearings I I9 fixed with respect to arm '0 while rod II 8 is similarly mounted in bearings I20. Compression spring I21 surrounds rod I I1 and exerts a force to the left -as viewed in Fig. '9 against adjustable nuts I22 on rod I I1, stop nuts I23 limiting motion of rod I I"! to the left. Similarly, a spring I24 surrounding rod H8 exerts a force to the right on adjustable nuts I25 on rods H8 and is nuts I26. The rods III and H8 normally position the dog II I as 'rods are yieldable to permit the dog to swing either to the right or left of the full line position shown in Fig. 9. Each 'dog is provided with a notch I21 proportioned to receive a pin I09 and has a forwardly extending tongue I 28 which is normally obliquely disposed to the right with respect to pin I09 as the lay reciprocates.

The mechanism for effecting the lateral unlocking motion of bar 90 includes a switch cam I30 rotating with the'bottom shaft 35 of the loom and having a groove I3I concentric with the bot tom shaft, see Fig. 6, defined by outer and inner flanges I32 and I33, respectively; Opposite sides of the cam are provided with switches, one of which is shown in Fig. 6. The switch includes an arm I35 having an inner surface I36 concentric with the bottom shaft when the switch "is in normal non-operating position. The arm is secured to a stud I31 rotatable with respect to the cam and having secured thereto a small setting arm I38 which projects beyond the web I39 of the cam which carries the-flanges I32 and I33. A spring I40 normally holds the switch I35 in the position shown in full lines in Fig. 6.

The Web I39 has a flange I45 defining the .upper end of a lever I96 outer part of an operating groove I46 having an incline I41 and a decline I48. This groove I46 normally has that end thereof opposite switch I35 closed by a second switch I49 pivoted on a pin I50 secured to the web I39. A spring II yieldingly holds this second switch in the full line .position shown in Fig. 6.

There will be two of the switches I35 on opposite sides of shaft 35 and each provided with its operating arm I88 and associated with a switch I49 and the switches will ordinarily be in such position, full lines in Fig. 6, as to keep a roll I52 on a lever I53 at uniform distance from the bottom shaft, thereby holding the lever I53 stationary on its'pivot I54. A spider I55 keyed to shaft 35 and I56 has arcuate slots I51 toreceive bolts I58 securing web I39 to the spider and permitting angular adjustment of the cam relatively to the shaft 35.

The control for the switches I35 is derived from the head motion K by structure shown more particularly in Figs. 2 and 3. The cylinders 44 and 45 have fixed with respect thereto small auxiliary cylinders I60 and I6I, respectively, between which is located a vibrator gear I62. This vibrator gear is of the usual constructionand is positioned by a pattern chain I64 which determines whether it shall be rotated to the left by cylinder I6I, Fig. 3, or to the right by cylinder I60. The gear I62 is attached by a connector I65 to an arm I66 pivoted at I61 to a'stand I68 held by the loom arch.

The arm I66 is pivotally connected as at I .to upper and lower links HI and I12, respectively, which are connected to arms I13 and I14, respectively, both of which move about a stud I fixed on stand I68. Arm I13 carries a push pawl I16 for cooperation with a ratchet wheel I11 having preferably six teeth, while arm I14 is provided with a pull pawl I18.

When the connector I65 moves from the full to the dotted line position of Fig. 3, push pawl I16 gives the. ratchet wheel a one-sixth rotation in a counter-clockwise direction as viewed in Fig. 3, and when the connector I65 moves back:

to the full line position the pull pawl I18 gives the ratchet wheel another one-sixth turn in a counter-clockwise direction. Each'reciprocation of the connector I65, therefore,-causes the-ratchet wheel to move through one-third of a. turn.-

A look wheel I80 is notched to receive a lock ing arm I8I pivoted on the stand I68 and held yieldingly in locking position by a tension spring I82. Mounted also on the stud I15 is a cam I85 having three equi-angularly spaced high dwells I86 alternating with low dwells I81. These high and low dwells cooperate with a roll I88 mounted on a bellcrank lever I89 pivoted as at I90 to the stand I68 and having a connector I9I to which is attached connector 80 forslackenerpawl 14 and also connector I95 which controls the switches I35. The ratchet wheel, lock wheel, and cam I85 are all secured together and rotate. in unison.

The flexible connection I95 is attached to the pivoted as at I91 to a carrier I98 through which the bottom shaft extends, see Figs. 1 and 14. Lever I96 has a depending arm I99 normally held in the full line position shown in Fig. 1 out of the path of operating arm I38 by a tension spring 200. Carrier I93 is angularly adjustable and held in fixed position on stationary bracket 203 by slot and bolt connection 204, see Fig. 14.;

The length of the pattern chain which deterpreferably as part of one of the guides 96.

" mines the vertical position of the vibrator gear I62 will depend upon the number of picks between adjacent crossings of the ladder cords I3. If, for instance, the cords I3 are to have a crossing for every fifty picks in the webs I0 and II the chain I64 will have forty-nine rolls 20I to hold the vibrator gear raised and will have one blank bar or sinker 292. When this blank bar 202 comes into controlling position the gear I62 will drop to be engaged by lower auxiliary cylinder I6I, which rotates in the direction of arrow (1, Fig. 3, and will turn to move connector I65 from the full to the dotted line position, thereby giving the cam I a one-sixth turn, as already described. On the next pick of the loom the first of the ensuing forty-nine rolls 20I on the pattern chain will raise the vibrator gear I62 and the upper auxiliary cylinder I60 will reverse its rotation to move the connector I65 back to its full line position of Fig. 3, thereby giving the cam I85 another one-sixth turn. 7

When arm I99 is moved to the right from the position shown in Fig. 1 by rocking of.lever.l96 it will lie in the path of one or another of the small switch operating arms I38 and as the switch cam rotates one of these arms will be rocked to move the associated switch I35 from the full to the dotted line position shown in Fig. 6. The length of the operating face 205 of arm I99 is sufficient to allow roll I52 to start its downward motion along incline I41 before said face 205 leaves the arm I38. Thereafter continued rotation of the cam I30 will raise the front end of lever I53 and cause upward motion of .a rod 206 connected thereto.

Up motion of rod 206 causes lateral shifting of bar and its attachment to the lay. To cause this result rod 206 'is connected to a lever 201 pivoted on a stand 208 fixed with respect to the loom frame and having an upwardly projecting arm 209 attached to a horizontal link 2I0 pivoted at 2| I to a slide bar 2I2. The latter is slidable in a direction parallel to the length of bar 90 in bearings 2I3 mounted on the breast beam, In order that longitudinal lateral slide motion of bar 2I2 may be communicated to the bar 90 I extend one of the sheet metal supporting arms 92 through a slot 2I4 in slide bar 2I2 as shown in Fig. '7.

In operation, the bar 90 will be locked normally in forward position and the lay will reciprocate backwardly and forwardly until a crossing of the ladder cords I3 is called, whereupon the connector I65 will be moved to advance the cam I95, thereby rocking the lever I89 from the full to the dotted line position of Fig. 3 during the forward stroke of thelay. Cylinders I60 and I6I are set early to effect this timing. Two results follow, namely, arm I99 moves into the path of the switch operating arm I38 by operation of connector I 95, and pin I08 rises to trip pawl 14 as the latter next reaches its rear position.

Incline I41 of cam I30 thereupon raises rod 206 to move slide bar 2I2 to the right and cause shifting of bar 90 to the right as viewed in Fig. '1 to disconnect the hooks I00 and I04, thus freeing the bar 90 for backward motion with the lay. At the same time operating pins I09 enter their slots III and dogs II4 are rocked to the right against action of their springs I24 to permit the pins to enter the slots. Cam incline I41 continues to raise rod 206 until hooks H are to the right of their respective webs and pins I09 have moved far enough to permit dogs M4 to snap back to normal position. Meantime, the lay has been receding and arms H have moved the pins I09 and bar 90 rearwardly.

When the lay reaches back center, pawl 14 will enter notch 69 preparatory to a slackening of ladder cords I3 by forward motion of rod 50, and roll I52 will have reached its lowest position. As the lay starts forwardly, rod 50 will advance, and roll I52 will enter cam decline I 48. Slide bar 2| 2 is now reversed and bar 90 moves to the left, Fig. 7, to move hooks H behind the crossed ladder cords. This movement of bar 90 to the left causes the pins I09 to enter the notches I21 of the dogs H4 androck said dogs to the dotted line position shown in Fig. 9 against the action of their springs I2I. As the lay continues to move forwardly therefore it acts through the dogs to transmit an advancing force to the pins I09 to cause forward motion of the supporting arms 92 and bar 90.

During this forward motion of bar 90 the hooks H will engage and bend the crossing cords I3 forwardly to positions in front of the web fells and hold them sufficiently taut so that they will be properly bound into the top and bottom webs without forming selvage loops when the picks laid by the shuttles when the lay was in rear position are beaten up.

As the lay approaches its forward position hooks I04will deflect hooks I00 to the left and immediately thereafter springs I02 will move the hooksinto holding relationship. The lay has now completed its forward stroke and as it starts to move rearwardly the notch I21 of eachdog will move away from its associated pin I09 and at some time during the backward stroke of the lay the fingers I28 will clear their pins I09. and the springs, I2I will return them to normal oblique position.

From the foregoing, it will be seen that I have provided a gang of warp advancing hooks on a common mounting which is normally locked in forward idle position and unlocked by a lateral motion which also connects it to the'l'ay to en'-' able the latter to move the hooks positively rearwardly and forwardly; It will also be seen that while the hook carrier is und'er'controlof the lay it is given areverse lateral motion to move the hooks behind the crossing warps. Also, thepattern mechanism controls the" slackener and. the hooks in such a way as to cause the lay to move the slackener forwardly while advancing the hooks. Further, the locking and unlocking of" the hook carrier in forwardidle position is facilitatedby the latches on the lay which are deflected in one direction when the carrier is connected to the lay and are later deflected in theopposite direction to return the hook carrier' to normal forward position where it can be locked. The control for the hook carrier includes a-switch cam which normally maintains the hook operating mechanism idle but which is moved bythe patternmechanism to operating position to con nect the hooks to the lay when the latter is in forward position. It will also be noted that the hookcarrier bar is controlled as to its'lateral positions by an actuator having sliding. contact with a part moving with the carrier bar to permit back and forth motion of the carrierbar while the actuator is movingin a line substantially parallel to the lay. Also, the pattern controlled cam is given-a, two-step motion thefirst stepzofiwhich' sets the mechanism to; advance the crossing warp and thesecond. of which: returns the camto normal position for the next succeeding operation.

For a fuller description of certain features of the loom, such as the crossing of the ladder warps fromthe top to the bottom web, and back, reference may be had to my prior Patents Nos. 2,025,866 and 2,082,890.

Having; thus described my invention it will be seen thatv changes and modifications may be made therein by those skilled in the art without departing; from the spirit and scope of the invention and; I do not wish .to .be limited to the details herein disclosed, but what I claim is:'

1.. In a loom for weaving a plurality of Venetian tapes each having spaced webs between which extend crossing warps which are crossed from one web tothe other at regular intervals, a lay reciprocating backwardly and forwardly, a plurality of crossing warp advancing hooks, one for each tape, a common carrier for all the hooks extending substantiallyparallel to and in front of the, lay, means to lock the carrier in forward idle position, normally inactive operating means including a. part on the carrier and a part on the lay, said parts to be connected by relative lateral movement, means to move the carrier laterally with respect. to the tapes to unlock said carrier and cause engagement of said parts when the lay is in forward position, the. lay thereafter during rearward movement thereof moving the carrier and hooks backwardly, and means to give the carrier a reverse lateral motion when the lay is in rearward position to locate the hooks behind the crossing warps, said parts thereafter effective during forward motion of the lay to move the carrier and hooks forwardly and return the carrier to locked idle position.

I 2. In a loom. for weaving a plurality of Venetian tapes. each having spaced webs between which extend crossing warps which are crossed from .one web to. the'other at, regular intervals, a lay reciprocating backwardly and forwardly, a

plurality of crossing warp advancing hooks, onefor each tape, a carrier bar to which the hooks are] attached extending substantially parallel to and in front. of the lay, means to lock the bar in normal idle forward position, operating means for the bar partly on the bar and partly on the lay and including a pin and a member having a slot' therein, the pin normally out of the slot when the bar isin normal idle' position, means to effect lateral motion of the bar with respect to the. tapes when the lay is in forward position to unlock the'bar and cause entry of the pin into the slotted member to effect rearward motion of the bar and books as the lay moves rearwardly, means to effect a reverse lateral motion of the bar when thelay is in rear position to place thehooks behind the crossing warps, the lay acting through said operating means on the following forward stroke thereof tomove the bar and hooks forwardlytoadvance thecrossing warps, the locking means constructed to lock the bar in normal idle position when the lay next. reaches its forward position. I

3. In a loom for weaving a: plurality of Venetian tapes each having spaced; webs between which extend crossing warps which are crossed from one-web to the other at. regular intervals, a lay reciprocating backwardly and forwardly, a plurality ofcrossing. warp advancing hooks, one for each tape, a. bar towhichthe hooks are attached extending substantially parallel to and in:front of the lay, means to hold the bar in normal forward idle; position, lateral motion of the spect to bar with respect to the tapes disconnecting the bar from the holding means, operatingmechanism for the bar partly on the latter and partly on the lay normally inoperative to cause movement of the bar by the lay when said bar is in normal idle position, means to shift the bar laterally with respect to the tapes to move said bar out of holding relation with respect to the holding means and move the operating mechanism to connect the bar to the lay when the lay is in forward position, subsequent rearward motion causing the lay to move the bar and hooks rearwardly by a force transmitted through said operating mechanism, means to give the bar a reverse lateral motion whenthe lay is in rearward position to place the hooks behind the crossing warps, the following forward motion of the lay transmitting a force through the'operating mechanism to move the bar and hooks forwardly to advance the crossing warps, the holding means constructed. to reestablish holding relationship with the bar to maintain the latter in normal idle position when the lay reaches forward position.

4. In a loom for weaving a plurality of Venetian tapes each having spaced webs between which extend crossing warps which are crossed from one web to the other at regular intervals, a lay reciprocating backwardly and forwardly, a plurality of crossing warp advancing hooks, one for each tape, a longitudinally extending carrier attached to the hooks and located in front of I and substantially parallel to the lay, means to hold the carrier in normal idle forward position, operating mechanism for the carrier partly on the latter and partly on the lay and including a pin and a slotted member and pivoted element normally but of engaging position relatively to the pin, means to move the carrier laterally with rethe tapes when the lay is in forward position to disconnect said carrier from the holding means and cause entry of the pin into the slotted member, the operating mechanism thereafter causing the carrier to move rearwardly with the lay, means operative when the lay reaches rearward position to effect ,a reverse lateralmotion of the carrier'to place the hooks behind the crossing warps and establish a driving connection between the pin and the pivoted element, the following forward motion of the lay transmitting a force through thepin and pivoted" element to the ,carrierto move the' latter forwardly as the lay movestoward forward posi-' tion to advance the crossing warps, the holding means constructed to hold the carrier in normal idle forward position when the lay next reaches forward position. 7

5. In a loom for weaving a plurality of Venetian tapes each having spaced webs between which extend crossing warps which are crossed from one web to the other at-regular intervals, a lay reciprocating backwardly and forwardly, a plurality of crossing warp advancing hooks, one for each tape, a longitudinally extending carrier attached to the hooks and'located in front of and substantially parallel to thelay, means to hold the carrier in normal idle forward position, normally inactive operating mechanism partly on the carrier and partly on including a pin on-the bar and a slotted membar and pivoted element on the lay for engagement with the pin, means to move the carrier laterally with respect tothe tapes when the lay is in'forward position to disconnect said carrier 1 the lay and from the holding means and cause entry of the 5 pin ,into the slotted member, the operating mechanism thereafter causing the carrier to move rearwardly with the lay, means operative when the lay reaches rearward position to effect a reverse lateral motion of the carrier to place the hooks behind the crossing warps and establish a driving connection between the pin and the pivoted element, the following forward motion of the lay transmitting a force through the pin and pivoted element to the carrier to move the latter forwardly as the lay moves toward forward position thereof to advance the crossing warps, the holding means constructed to hold the carrier in normal idle forward position when the lay next reaches forward position, said pivoted element being normally spring held in oblique position with respect to the lay out of engaging position with respect to the pin during normal loom operation and pivoting against spring action during said reverse lateral motion of the carrier and returning to oblique position during the backward stroke of the lay after the carrier has been returned to normal idle position.

6. In a loom for weaving a plurality of Venetian tapes each having spaced webs between which extend crossing warps which are crossed from one web to the other at regular intervals, a lay reciprocating backwardly and forwardly, a plurality of crossing warp advancing hooks, one for each tape, a bar carrying the hooks to be reciprocated backwardly and forwardly by the lay, an ,operating mechanism to connect the bar to the lay, saidmechanism including a pin cates normally, lateral motion of the bar when the lay is in forwardposition causingv the pin to move into the slotted memberto establish driving connection between the lay and the, bar and effect deflection in one direction ofthelelement,

lateral motion of the 'bar in a reverse direction causing lateral motion of the element in the opposite" direction when thelay is in rear position to connect said elementto'tlie pin and, thereafter move the carrier forwardly asjthe. lay advances.

'7. In a loom for weaving a plurality of Ilene tian tapes each having spaced webs between which extend crossing warps. which are [crossedfrom oneweb' to the otheriat regularintervals,

a lay reciprocating backwardly and forwardly," aplurality of crossing warp advancing hooks, one

for each tape, a bar carrying the hooks'tobe recipro cated backwardly and forwardly by the lay, anoperatingmechanism to connect the bar to the lay, said mechariismincluding a pin on the bar and a member on the lay slotted to receivethe pin and includingalso a 4 dog pivoted to the lay anddisposed normally obliquely withrespect to i tc m mber ai o ihavina- :I Otch in the forward end thereof to receive the pin, later-c al motion of; the barin one, direction causing entry of the pin into the'slot to connect the bar to the lay and causingdeilection of the dog inone direction; and lateral .motionvof the-bar in' the opposite direction causingnmovement of the pin outtof theislot and into' .the notch of the dog to enable the l'ayrto advance the barby a; force transmitted through s'aid'dogf, L

8. In a loomfor weaving aplurality of Ilene tian "tapes, each having spaced webs be'tween which extend crossing warps which'are crossed from one web to the other at regular intervals, a lay reciprocating backwardly and" forwardly, a plurality of crossing warp advancing hooks, one for each tape, a carrier bar on which are mounted said hooks, a forwardly extending member connected to the bar, an actuator having a sliding movement in a direction parallel to the lay, fixed supports for the actuator, said member extending through and having sliding engagement with respect to the actuator, means to move the actuator laterally when the lay is in forward position to effect lateral motion of the member and carrier bar and hooks, means thereupon operative to connect the carrier to the lay and cause sliding motion of the member relatively to the actuator, mean to effect a reverse lateral motion of the actuator when the layis in rear position to effect a reverse lateral motion of the member and carrier and hooks to locate the latter behind the crossing warps, said connecting means thereafter moving the carrier forwardly to effect forward sliding movement of the member relatively to the actuator, and mean to lock the carrier in forward position.

9. In a loom for weaving a plurality of Venetian tapes each having spaced webs between which extend crossing warps which are crossed from one web to the other atregula intervals, a lay reciprocating backwardly and forwardly, a plurality of crossing warp advancing hooks, one for each tape, a carrier in front of and substantially parallel to the lay on which the hooks are mounted, an actuator slidable in a direction substantially parallel to the lay and laterally with respect to the tapes, slidable means to connect the carrier to the actuator, means to move the actuator laterally in one direction when the lay is in forward position to cause the slidable means to move the carrier laterally, means to connect the carrier to the lay to cause the latter to move the carrier rearwardly when the carrier moves laterally, and means thereafter operative to give the actuator a reverse lateral motion to move the slidable means and carrier to a position to locate said hooks behind the crossing warps when the lay is in rear position, the lay thereafter operative through the connecting means to move the carrier forwardly to cause the hooks to advance the crossing warps, said slidable means having a sliding connection with respect to the actuator in the direction in which the lay reciprocates and moved laterally by the actuator to cause the carrier to have the aforesaid lateral motion in one direction when the lay is in forward position and a reverse lateral direction when the lay is in rearward position.

10. In a loom having crossing warps to be advanced by a hook and wherein mechanism is provided to move the hook from a position in front of the crossing warp laterally to a position behind the crossing warps and then forwardly, a controller for the mechanism movable from normal to controlling position and when in controlling position initiating the aforesaid operation of the mechanism, a rotatable cam, a member acting at regularly recurring intervals to have a movement in one direction on one pick of the loom and a movement in the opposite direction on the next pick of the loom, means to cause the cam to have a working stroke when the member has the first of said movements, means operated by the cam when the latter has a working stroke to move the controller from normal to controlling position, and means to cause the cam to have a second motion when the member has position, means controlled by the the aforesaid second movement to effect movement of the controller from controlling to normal position.

1 In a loom having crossing warps to be advanced by a hook and wherein mechanism is provided to move the hook from a position in front of the crossing warpslaterally to a position behind the crossing warps and then forwardly, a controller for the mechanism movable from normal to controlling position and when in controlling position initiating operation of the mechanism, a rotatable cam, a member acting at regularly recurring intervals to have a motion in one direction on one pick of the loom and in the opposite direction on the next pick of the loom, a ratchet wheel connected to' the cam, a push pawl connected to the member to cooperate with the ratchet wheel to give the cam an angular movement when said member has the first of the aforesaid movements, a pull pawl connected to the member to give said cam a second angular motion when the member has the second of the aforesaid motions, a lever movable from normal to working position by the cam when the latter has the first angular motion, connections between the lever and the controller to move the latter from normal to controlling position when the lever moves from normal to working position, and means to move the lever from working to normal position when the cam has'the second angular motion and effect movement of the controller to normal position.

12. In a loom having crossing warps to be advanced by a hook and wherein mechanism is provided to move the hook from a position in front of the crossing warps laterally and then to a position behind the crossing warps and then forwardly, a controller for the mechanism movable from normal to controlling position and when in controlling position initiating the aforesaid operation of the mechanism, a slackener means for the crossing warp, a controller for the slackener movable from normal to controlling slackener controller to cause operation of the slackener when the controller therefor moves to controlling position, pattern mechanism including an element having a movement at regularly recurring intervals during loom operation, and means connecting the element to both of the controllers when said element has said movement to cause operation of the hook controlling mechanism and the slackener.

13. In a loom for weaving Venetian tapes having a crossing warp to be advanced and slackened, the m having a lay which reciprocates backwardly and forwardly, an advancing hook for the crossing warp, means to connect the hook to the lay to cause the latter to give the hook a crossing warp advancing stroke, a controller for said means movable from idle to working position to cause said means to connect the hook to the lay, a slackener, an actuator for the slackener normally idle with respect to the slackener and connected to and moving with the lay, and a controller for the slackener actuator to move the latter from idle to working position with respect to the slackener, a member having a motion at regularly recurring intervals during the weaving of the tape, and means to cause said member when having said motion to move both the controllers from idle to working position and cause the lay to actuate both the hook and the slackener.

14. In a Venetian tape loom having crossing warps to be slackened and advanced, a lay reciprocating backwardly and forwardly, a crossing warp advancing hook, a slackener for the crossing warps, a member having a controlling motion at regularly recurring intervals during loom operation, two difierent mechanisms, one for the advancing hook and one for the slackener, both mechanisms controlled by the memberwhen the latter has a controlling motion, means controlled by the member to connect one of said mechanisms to the lay, and additional means to connect the other mechanism to the lay to cause the lay to operate both the hook and the slackener.

15. In a Venetian tape loom having crossing warps to be slackened and advanced, a lay reciprocating b ackwardly and forwardly, a crossing warp advancing hook, a slackener for the crossing warps, a member having a controlling motion at regularly recurring intervals during loom operation, and two different mechanisms both controlled by the member when the latter has a controlling motion, one of said mechanisms to connect the hook to the lay when the latter is in forward position and maintain the hook in operative relation with respect to the lay during a backward and subsequent forward motion of the lay, the hook operative to advance the crossing warp during said subsequent motion of the lay, and the other mechanism connecting the slackener to the lay for forward motion of 30 the lay during said subsequent forward motion thereof to cause the lay to operate the slackener.

16. In a loom having crossing warps to be advanced by a hook and wherein mechanism is provided to move the hook from a position in front of the crossing warps laterally and then to a position behind the crossing warps and then for-.

Wardly, a controller for the mechanism movable from normal to controlling position and when in controlling position initiating the aforesaid operation of the mechanism, a member to be reciprocated, driving means to cause reciprocation of the member at periodic intervals during loom operation, an actuator lever for and connected to the controller, a cam to move the actuator lever, and connections from the member to said cam including an actuator to cause angular movement of the cam in a given direction when the driving means moves said member in one direction to cause movement of the actuator lever to effect movement of the controller from normal to controlling position, said connections including a second actuator to cause a second angular movement of the cam in the same given direction when the driving means moves the member in a direction opposite at said one direction to effect a reverse movement of the actuator lever to effect movement of the controller from controlling to normal position.

ELBRIDGE R. HOLMES, 

